Radioswitch



June 15 1926. 1,589,180

A. F. KNOOP v RADIOSWITCH Filed June 22. 1922 2 Sheets-Sheet l June 15 1926. 1,589,180

A. F. KNOOP RADIOSWITCH Filed June 22. 192 2 Sheets-Sheet 2 Patented June 15, 1926.

PATENT OFFICE.

ARNOLD F. KNOOP, 0F PEOTONE, ILLINOIS.

nAnIoswI'rcH.

Application Med J'une 22, 1922. Serial No. 570,051.

bly invention relates to new and useful improvements 111 radlo switches, and has for its prmcipal ob]cct. the provlslon of an 1mproved construction of this character which will be highly eflicientin use and economical in manufacture.A

Other objects will appear hereinafter.

The invention consists in the combination and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which, l

Fig. 1 is a front elevational view of a radio switch embodying the invention,

Fig. 2 is a vertical sectional detail view of lthe same taken substantially on line 2-2 of Y Fig. 1,

f so

Fig. 3 is a rear elevational view of the same, and

Fig. 4 is a sectional detail view, of the ame, taken substantially' on line 4 4 of The preferred form of construction, as illustrated in the drawings, comprises a cylindrical member A having flanges 10 and l1 and a central web 12, all of which are made of non-conducting material. The cylindrical member A is mounted on a suitable panel 13 by any suitable means, which is in this instance by screw members 12', and carries on its flanges l1 a plurality of spaced tap posts 14 arranged circumferentially with respect thereto, the heads 15 of the posts 14 are preferably square or rectangular in shape;V Each of'the tap posts 14 is connected by means of a clrcuit wire 16 to a tuning coil 17 as shown in Fig. 3. J ournalled in the cylindrical .casing A and projecting outwardly from the panel 131s a shaft portion 16 carrying collars 17 and 18 which are ,vond the panel 13 or affording means for reversing the cylindrical member A if desired.

A connectlon .between the shaft portion and the heads 15 of the tap posts 14 is made through t-he medium of a,brusl1 20 having an inwardly turned lip 21 which is/adapted to successively enga-ge'the heads 15 when the "cction 22 as at 23 forming an intcvral art .l h D of thc collar 1S, as :1t 23.

The shaft I6 is also connected in circuit with a suitable ground wire 24 connected to the tap posts 25 as at 25 by :1 member 26 of conductive material which is connected to the tap post 25 as at 27. From the tap post 25 the member 26 passes through an opening 28 formed in thc web 12 as shown in Fig. 3, and brought in contact with the shaft 16 which passes through an enlarged portion 27 formed integrally on the member 26. The member 26 is preferably of resilient material having a slit 28 cut in the enlarged portion 27 as illustrated in Fig. 4, this construction having the effect of a vlock washer. The enlarged portion 27 of the member 26 is positioned between web 12 and the collar 17 and is constantly in contact with the collar, due to the resiliency of the enlarged portion 27 which causes the split portions 28 and 29 to spring laterally from cach other.

The shaft. 16 is manipulated throu h the medium of a knob 29 which is fixed t ereto by means of a set screw 30'. The knob 29 carries a dial plate 31 having a beveled edge 32 bearing numerical markings which represcnts each one of the tap posts 14. In order to determine the position of the brush 2() a groove or indentation 32 is formed in the panel 13 and when one of the numerical markings is opposite or in alignment with the groove 30 it will indicate that the brush that the ground wire 24 is connected vto this respective tap post.

The operation of my improved raido switch is obvious from the description herein set forth and it need be, only mentioned that by the construction of a switch for the purcost of manufacture will be economical and the switch -be of great advantage and utility in many respects.

While l have illustrated and described the preferred form of construction for carrying my invention into eHect, this is capable of variation and modification without departing from the spirit of the invention. t, therefore', do not wish to be limited to the precise details of construction set forth, but desire to avail myself ot such variations and modifications as come within the scope of the appended claims.

Having Vdescribed my invention, what I claim as new and desire to secure by Letters Patent is: Y

1. A radio switch including a non-conducting hollow cylinder having a partition intermediate its ends; a conducting shaft passing through said partition; a series of tap posts passing through said cylinder between one en d thereof and said partition; contacts on sald tap posts interiorly of the cylinder; a'

lducting hollow cylinder;

conductor engaging said shaft, leading through said partition and connected to one of said tap posts; and a conductor electrically connected to and movable with said shaft and adapted successively to engage the contacts during rotation of the shat substantially as described. 2. A radio switch including a non-cona non-conducting partition spaced from one end thereof to provide an open end; a conducting shaft journaled in said partition and extending into said open end;a series of tap posts passing through said cylinder circumferentially with respecttliereto and into said open end; contacts on said tap posts within said open end; a conductor extending from the shaft through the said partition to one of the tap posts and a conductor carried by the shaft in said open end for engaging said contacts, substantially as described. vln testimony whereof I have signed my name to this specication.

ARNOLD F. KNOOP,V 

